à¤Ã×èͧÁ×ÍÇÔ·ÂÒÈÒʵÃì ÍØ»¡Ã³ìÇÔ·ÂÒÈÒʵÃì à¤ÃÕèͧÇÑ´ à¤Ã×èͧÇÑ´âÍÍÒÃì¾Õ à¤Ã×èͧÇÑ´âÍÍÒÃì¾Õ ORP Meter à¤Ã×èͧÇÑ´âÍÍÒ¾Õ ORP-200 Waterproof ORP Meter Ideal for all ORP testing, including anti-oxidant measurement, water purification applications, ionizers, agriculture, aquariums & aquaculture, chlorine monitoring, cooling tower disinfection, environmental testing, fruit & vegetable washing, hydroponics, metal finishing, ozone system monitoring, pharmaceutical & medical applications, pools & spas, pulp bleaching, vineyards & wineries and water treatment. FEATURES Measures Oxidation Reduction Potential (Redox) and Temperature Auto-ranging calibration with digital fine tuning Includes 4 pH buffer solution in a sponge embedded in a clear cap Waterproof housing (IP-67 rating) Simultaneous temperature display Digital Calibration (push button) Auto-off function, data-hold function and low-battery indicator. Display: large and easy-to-read LCD screen includes simultaneous temperature reading. Factory Calibrated: The ORP-200 meter is factory calibrated to +200 mV The meter can be easily recalibrated with digital calibration using the push buttons, rather than a screwdriver. Includes a cap, batteries, and lanyard SPECIFICATIONS ORP Range: -999 to +1000 mV Temperature Range: 0-80 °C; 32-176 °F Resolution: 1 mV; Temperature resolution is 0.1 °C/F Accuracy: 0.5% (+/- 2mV) Calibration: Digital calibration by push button. Electrode: Replaceable glass sensor and reference tube electrodes Housing: IP-67 Waterproof (submersible; floats) Power source: 3 x 1.5V button cell batteries (included) Dimensions: 18.5 x 3.4 x 3.4 cm (7.3 x 1.3 x 1.3 inches) Weight: 96.4 g (3.4 oz) HM Digital ORP Meter ORP-200 Oxidation Reduction Potential Water Quality Meter à¤ÃÔèͧÇÑ´¤èÒ ORP à¤Ã×èͧÇÑ´¤ÇÒÁµèÒ§ÈÑ¡Â à¤Ã×èͧÇÑ´¤Ø³ÀÒ¾¹éÓ